87453097821 has 8 divisors (see below), whose sum is σ = 129560144960. Its totient is φ = 58302065196.

The previous prime is 87453097819. The next prime is 87453097829. The reversal of 87453097821 is 12879035478.

It is a happy number.

87453097821 is a `hidden beast` number, since 87 + 4 + 530 + 9 + 7 + 8 + 21 = 666.

It is not a de Polignac number, because 87453097821 - 2¹ = 87453097819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87453097829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619501785 + ... + 1619501838.

It is an arithmetic number, because the mean of its divisors is an integer number (16195018120).

Almost surely, 2^87453097821 is an apocalyptic number.

It is an amenable number.

87453097821 is a deficient number, since it is larger than the sum of its proper divisors (42107047139).

87453097821 is a wasteful number, since it uses less digits than its factorization.

87453097821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239003632 (or 3239003626 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 87453097821 in words is "eighty-seven billion, four hundred fifty-three million, ninety-seven thousand, eight hundred twenty-one".